Pre-Wired Terminal Box Assemblies
DIN rail, terminal blocks, wire duct, labels, grounding and low-voltage wiring prepared from approved drawings and schedules.
View pathDrawing-based electrical enclosure RFQs for U.S. industrial buyers
Fast Custom Power Enclosure Assemblies Built From Your Drawings
Upload drawings, BOMs or terminal schedules for custom electrical enclosures, modular cabinets, mounting plates and pre-wired subassemblies. The intake starts with email plus files, then routes to AI screening or manual review.
Drawing-based RFQ
Reduce U.S. field wiring hours
Prototype to small batch
- Free AI Quote
- 3–7 Day Prototype
- Inspection Photos
- U.S. Warehouse Support
- Free Remake Protection
Core differentiation
Reduce U.S. Field Wiring Hours
Square Box provides component-ready and pre-wired enclosure assemblies built to your drawings and approved BOMs, helping OEMs, panel shops and contractors move repetitive wiring and enclosure preparation work from the job site to a controlled factory process.
Data Center Power Enclosure Assemblies
Component-ready auxiliary enclosures for power monitoring, UPS, PDU, RPP, generator and cooling support systems.
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Energy Storage / Grid Auxiliary Cabinets
Outdoor and component-ready cabinets for BESS, transformer monitoring, microgrid and field-installed control equipment.
View pathStandard Product Series
Three fast starting points for quote-ready drawings
Start from a defined series, then customize dimensions, cutouts, mounting details, materials, finish and assembly scope from your CAD package.
Pre-Wired Terminal Box Assemblies
Component-ready terminal boxes with enclosure fabrication, DIN rail, wire duct, terminal blocks, grounding and customer-approved low-voltage assembly support.
- Standard models
- SB-PWT-1212-6, SB-PWT-1614-8, SB-PWT-2016-8 ...
- Typical sizes
- 12x12x6 to 30x24x12 in.
- Best for
- Data center contractors, panel shops, critical power OEMs
Wall-Mount NEMA-Style Enclosures
Custom wall-mount boxes for controls, junctions, instrumentation, IoT devices and compact panel builds.
- Standard models
- SB-WM4-1212-6, SB-WM4-1614-8, SB-WM4-2016-8 ...
- Typical sizes
- 12x12x6 to 36x30x12 in.
- Best for
- Panel shops, automation builders, machine builders
Modular Floor-Standing Control Cabinets
Floor-standing cabinets with frames, doors, base plinths, mounting rails and internal plates for larger control systems.
- Standard models
- SB-FS9-1866, SB-FS9-1888, SB-FS9-2066 ...
- Typical sizes
- 1800 / 2000 mm height modular cabinet platforms with 600 / 800 / 1000 mm width and depth options. Approximate inch equivalents can be confirmed during RFQ.
- Best for
- Machine builders, automation cells, data center power systems
Also available: Stainless Steel Outdoor Enclosures, Outdoor Utility Control Cabinets, Custom Mounting Plates / Back Panels.
View All Standard SeriesSpeed + risk control
A short process for prototype and small-batch enclosure work
- 1Upload Drawing
- 2Engineering Review
- 3AI Quote or Manual Review
- 43–7 Day Prototype
- 5Inspection Photos
- 6Express Delivery After Dispatch
Trust evidence
Why U.S. Buyers Trust Square Box
20+ Years Sheet Metal Experience
Sheet metal fabrication and export project experience for industrial enclosure buyers.
Engineering + Production Under One Roof
CAD review, fabrication, finishing, hardware assembly, inspection and packaging in one workflow.
Inspection Photos Before Shipment
Prototype orders can be checked by photos before dispatch, including cutouts, hardware, finish and packaging.
U.S. Warehouse Support
Available for approved repeat parts, replacement parts, sample forwarding and small-batch stocking programs.
Capabilities Snapshot
Fabrication, finishing, assembly and export control
Laser Cutting & Bending
Blank profiles, door panels, gland plates, cutouts, brackets and formed enclosure parts made from CAD/DXF files.
Welding & Powder Coating
Frames, seams, studs, supports and cabinet structures finished to project color, texture and masking requirements.
Gasket / Hardware / Assembly
Gaskets, hinges, locks, grounding studs, mounting plates, DIN rail, wire duct and customer-approved hardware installed before shipment.
QC & Export Packaging
Inspection photos, critical feature checks and protective export packaging for prototype and small-batch deliveries.
Application Examples
Critical power enclosure assemblies built from drawings
Pre-Wired Terminal Box for Data Center Contractor
- Buyer type
- Data center electrical contractor
- Need
- Reduce field wiring hours for repeat monitoring and auxiliary terminal boxes used across a critical power project.
- Result
- Prototype review package prepared for buyer approval before repeat batch discussion.
Transformer Monitoring Cabinet for Grid Equipment OEM
- Buyer type
- Grid equipment OEM
- Need
- Outdoor auxiliary cabinet for monitoring components used with transformer equipment.
- Result
- Component-ready cabinet sample prepared for OEM engineering review.
BESS Auxiliary Control Box
- Buyer type
- Energy storage equipment builder
- Need
- Auxiliary low-voltage control box for battery cabinet and BOS equipment integration.
- Result
- Prototype enclosure assembly moved from drawing package to component-ready sample.
Have drawings, BOM or a terminal schedule ready?
Upload your CAD, PDF or ZIP package and include assembly level, material, finish, quantity and delivery target.
Get Free AI Quote